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HK: Hadronen und Kerne
HK 38: Spectroscopy 104 ≤ A < 140
HK 38.4: Talk
Tuesday, March 17, 1998, 17:45–18:00, D
Correlated Pair-Transfer with Deformed Nuclei∗ — •H. Bauer1, T. Härtlein1, D. Pansegrau1, D. Schwalm1, and EBGSI 962 — 1Max-Planck-Insitut für Kernphysik Heidelberg — 2
The ’cold’ correlated 2n-pair-transfer has been examined using the reaction
116Sn(162Dy, 160Dy)118Sn in order to study nucleon-nucleon
pairing correlations under the influence of
rotation and deformation. The experiment was performed during the GSI CLUSTER campaign using the
Crystal Ball spectrometer combined with 5 CLUSTER detectors and an
array of position-sensitive parallel-plate avalanche counters to fix
the kinematics. As one cannot gate on cold transfer (i.e. direct transfer
from yrast states in 162Dy to yrast states in 160Dy), the
cold transfer has to be selected by suppressing the dominant
uncorrelated (’hot’) part of the transfer.
The Crystal Ball offers an effective way to suppress
hot transfer processes because its 4π geometry allows to detect
almost all emitted γ-rays in an event. The CLUSTER detectors
were used due to their high Ge-efficiency in order to identify the transfer
channel and to resolve individual final states.
The angular distribution of the cross section for the direct
population of individual low spin
states in 160Dy in a cold transfer reaction has been measured for
the first time and exhibits characteristic properties which can be
compared with a calculation [1].
∗supported by BMBF
Landowne et al., Nucl. Phys. A484 (1988)98